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Corten Steel Plate & Sheet (ASTM A588 / A242)
BRAND: PROMISTEEL
THICKNESS:
Cold Rolled (Sheet): 0.5 mm – 3.0 mm
Hot Rolled (Plate): 3.0 mm – 100 mm+
WIDTH: 1000mm, 1250mm, 1500mm, 2000mm (Custom Slitting Available)
SURFACE: Mill Finish (Black/Blue) or Pre-Rusted (Red Oxide)
SERVICE: Laser Cutting, Bending, Welding, Punching
MOQ: 25 Tons
Corten steel (also known as Weathering Steel) is a high-strength, low-alloy steel designed to eliminate the need for painting. When exposed to the atmosphere, it develops a stable, rust-like appearance that acts as a protective barrier against further corrosion. Unlike regular carbon steel that rusts away, Corten steel's rust layer is dense and self-healing, making it incredibly durable for outdoor structures. Whether for an artistic facade or a heavy-load bridge, Promisteel offers the exact grade you need.
Which Grade Do You Need? (A588 vs. A242)
Choosing the right grade is critical for your project's safety and cost.
ASTM A242 (Corten A): The Aesthetic Choice
- Best For: Architectural facades, cladding, landscape planters, and light structures.
- Why: Excellent corrosion resistance (5-8x better than carbon steel) and forms a vibrant, uniform patina.
ASTM A588 (Corten B): The Structural Choice
- Best For: Heavy-load bridges, highway structures, shipping containers, and industrial frames.
- Why: Higher yield strength (345 MPa) and better impact toughness, especially in cold environment.
Not sure? Ask our engineers. We function like "Industrial Doctors," prescribing the exact grade based on your climate and load requirements.
Inventory & Size Range
Promisteel maintains a large inventory of weathering steel coils and plates to ensure fast delivery.
- Thin Sheets (SPA-H / Corten A): Ideal for cold-formed shapes, panels, and fire pits.
- Heavy Plates (A588 / Q355NH): Up to 100 mm thick for major infrastructure projects.
- Customization: We offer "Cut-to-Length" and slitting services to minimize your scrap waste.
Value-Added Processing Services
We don't just sell raw plates; we deliver project-ready components.
Laser Cutting
Precision cutting for decorative screens and logos.
Bending & Forming
Creating planter boxes, retaining walls, and facade cassettes.
Pre-Rusting Service
Skip the 6-month wait. We can treat your plates to have a finished patina upon delivery.
Why Invest in Corten Steel? (Lifecycle Cost)
Although the initial price of Corten is higher than regular carbon steel, it is the smarter long-term investment.
- Zero Maintenance: No painting or repainting required every 5 years.
- Savings: Over a 20-year cycle, Corten steel saves up to 65% in total costs compared to painted steel due to zero maintenance labor.
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